#if 1
// (value & mask) == 0 ? 1 : 0
static uchar inverted_popcnt8[256] = {
8,7,7,6,7,6,6,5,7,6,6,5,6,5,5,4,
7,6,6,5,6,5,5,4,6,5,5,4,5,4,4,3,
7,6,6,5,6,5,5,4,6,5,5,4,5,4,4,3,
6,5,5,4,5,4,4,3,5,4,4,3,4,3,3,2,
7,6,6,5,6,5,5,4,6,5,5,4,5,4,4,3,
6,5,5,4,5,4,4,3,5,4,4,3,4,3,3,2,
6,5,5,4,5,4,4,3,5,4,4,3,4,3,3,2,
5,4,4,3,4,3,3,2,4,3,3,2,3,2,2,1,
7,6,6,5,6,5,5,4,6,5,5,4,5,4,4,3,
6,5,5,4,5,4,4,3,5,4,4,3,4,3,3,2,
6,5,5,4,5,4,4,3,5,4,4,3,4,3,3,2,
5,4,4,3,4,3,3,2,4,3,3,2,3,2,2,1,
6,5,5,4,5,4,4,3,5,4,4,3,4,3,3,2,
5,4,4,3,4,3,3,2,4,3,3,2,3,2,2,1,
5,4,4,3,4,3,3,2,4,3,3,2,3,2,2,1,
4,3,3,2,3,2,2,1,3,2,2,1,2,1,1,0
};
#else
...
         for (int j = 0; j < 256u; j++)
         {
             int val = 0;
             for (int mask = 1; mask < 256; mask += mask)
                 val += ((j & mask) == 0) ? 1 : 0;
             inverted_popcnt8[j] = (uchar)val;
         }
...
#endif